[in.de.fin.able] adj (1810): incapable of being precisely described or analyzed -- in.de.fin.abil.i.ty n -- indefinable n -- in.de.fin.able.ness n -- in.de.fin.ably adv
INDEFINABLE
Meaning of INDEFINABLE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012